This is lower than my last QX Quad Core Processor with 4GB RAM and a GTX280 which scored 5.9. Could somebody please explain why this is and bearing in mind I asked my supplier for a top spec and have spent close on 3K have I reason to complain?

This should be on the Win7 forum for better results, but from the figures it's the RAM the culprit (the score is based on the lowest figure). As it's recently new, the vendor is the next point of contact with a view to exchanging the RAM, but even if changing that ups the RAM score to 7+, your next score will be the HDD = 5.7 so there will be gloom again :-(Looks like an RMA to me, sorry.